The Mets announced this evening that All-Star second baseman Daniel Murphy is headed to the disabled list with a right calf strain. In a corresponding roster move, prospect infielder Dilson Herrera will be called up from Double-A Binghamton.

Murphy left Sunday’s game with the injury and hasn’t progressed as hoped. He was sent for an MRI today and there’s no clear timetable for his return.

Herrera, who was acquired from the Pirates in the Marlon Byrd deal last August, was batting .340/.406/.560 with 10 home runs and 48 RBI over 61 games in Double-A this season. This was after putting up a .307/.355/.410 batting line over 67 games with High-A St. Lucie.

The promotion comes as a bit of a surprise, as the 20-year-old Herrera was the youngest player in the Eastern League, but he was required to be added to the 40-man roster this offseason. The Murphy injury ultimately moved up the timeline and gives him a chance to get some major league experience going into 2015. That could be a valuable thing if the Mets consider trading Murphy this offseason.

Very interesting. Herrera, though diminutive, has looked electric at the plate this entire year. But what happens when Murphy returns? Dilson needs to play. What makes this especially odd is that Binghampton is in the playoffs and Alderson has generally let prospects get that experience over ab’s with the big club.